Search for QCD instanton induced events in deep inelastic ep scattering at HERA
(2004) European Physical Journal C. Particles and Fields — Vol. C34, p. 255-265 (2004)
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- Abstract
- (en) A search for QCD-instanton-induced events in deep inelastic ep scattering has been performed with the ZEUS detector at the HERA collider, using data corresponding to an integrated luminosity of 38 pb^{-1}. A kinematic range defined by cuts on the photon virtuality, Q^2 > 120 GeV^2, and on the Bjorken scaling variable, x > 10^{-3}, has been investigated. The QCD-instanton induced events were modelled by the Monte Carlo generator QCDINS. A background-independent, conservative 95% confidence level upper limit for the instanton cross section of 26 pb is obtained, to be compared with the theoretically expected value of 8.9 pb. Comment: 27 pages, 1 table, 6 figures
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Chekanov, S., Piotrzkowski, K., & et al. (2004). Search for QCD instanton induced events in deep inelastic ep scattering at HERA. European Physical Journal C. Particles and Fields, C34, 255-265. https://doi.org/10.1140/epjc/s2004-01735-3 (Original work published 2004)